28337280816 has 80 divisors (see below), whose sum is σ = 79012130400. Its totient is φ = 8699658240.

The previous prime is 28337280779. The next prime is 28337280821. The reversal of 28337280816 is 61808273382.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229606 + ... + 330746.

It is an arithmetic number, because the mean of its divisors is an integer number (987651630).

Almost surely, 2^28337280816 is an apocalyptic number.

28337280816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28337280816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39506065200).

28337280816 is an abundant number, since it is smaller than the sum of its proper divisors (50674849584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28337280816 is a wasteful number, since it uses less digits than its factorization.

28337280816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101614 (or 101608 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 28337280816 in words is "twenty-eight billion, three hundred thirty-seven million, two hundred eighty thousand, eight hundred sixteen".